Sandisk SDSDX3-004G-A31 4GB Extreme III SD Card Review

I was looking for a SDHC card for my newly purchased Nikon D90 camera. I noticed a price difference among Sandisk Extreme III cards and wondered if the specs could tell me why some were more expensive. This one has a transfer rate of 30 MB/sec, while other Extreme III cards are rated at 20 MB/sec. This one is definitely much faster. Sandisk should have a more obvious designation on the card or in the name.

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